[PATCH v3 4/4] migration: Deprecate old compression method
Juan Quintela
quintela at redhat.com
Thu Oct 12 12:14:19 UTC 2023
Markus Armbruster <armbru at redhat.com> wrote:
> Juan Quintela <quintela at redhat.com> writes:
>
>> -# @deprecated: @disk migration is deprecated. Use driver-mirror
>> -# with NBD instead.
>> +# @deprecated: @disk migration is deprecated. Use driver-mirror with
>> +# NBD instead. @compression is unreliable and untested. It is
>> +# recommended to use multifd migration, which offers an
>> +# alternative compression implementation that is reliable and
>> +# tested.
>
> Again, single deprecation note under "Features:", please.
Done in all places.
>
>> #
>> # Since: 0.14
>> ##
>> @@ -290,7 +295,7 @@
>> '*blocked-reasons': ['str'],
>> '*postcopy-blocktime': 'uint32',
>> '*postcopy-vcpu-blocktime': ['uint32'],
>> - '*compression': 'CompressionStats',
>> + '*compression': { 'type': 'CompressionStats', 'features': ['deprecated'] },
>> '*socket-address': ['SocketAddress'],
>> '*dirty-limit-throttle-time-per-round': 'uint64',
>> '*dirty-limit-ring-full-time': 'uint64'} }
>> @@ -445,7 +450,8 @@
>> # compress and xbzrle are both on, compress only takes effect in
>> # the ram bulk stage, after that, it will be disabled and only
>> # xbzrle takes effect, this can help to minimize migration
>> -# traffic. The feature is disabled by default. (since 2.4 )
>> +# traffic. The feature is disabled by default. Obsolete. Use
>
> Some places call it "deprecated", others "obsolete". Best to always use
> "deprecated".
"obsolete" word removed from this series O:-)
> More of the same below.
>
>> +# multifd compression methods if needed. (since 2.4 )
>> #
>> # @events: generate events for each migration state change (since 2.4
>> # )
>
> [...]
>
> Migration has grown way too many options. Thanks for pruning them back
> some.
I am going to redo the 1st patches to just print an error if you use
-i/-b on HMP. So that will clean up your last comment for that patch.
Thanks.
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